In travel industry, the customer usually comes from the difference areas and your website contents usually is hosted in one location also, some customers will get slow speed if they are far from hosting provider. For example, if your website is hosted in North America, the customer from Asia, or Australia can get slow speed.

To improve the website loading time, you can use the services from the CDN.

Google is one of best service provider that we can use, and it's free for small to medium traffic website.